Wood-cutting machine



Nov. 31,1925.

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Patented Nov. 3, 192.5,

Unirse stares SILAS S. SEE, OF ROANOKE, VIRGINIA.

WOOD-CUTTING MACHINE.

Application filed May 2,

I'oaZZ whom it may concern Be it known that I, Sims Si Sen, a citi-` zen of the United States, residing at Roanoke, inthe county` of Roanoke and State of Virginia, have invented certain new and useful Improvements in `Wood-Cutting Machines; and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appert-ains to make and use the same.

This invention relates to machines for cut ting openings in wooden or other stock, and is primarily designed for rapidly and accurately cutting arcuate openings, such for instance as hand holes as are commonly provided in the ends of crates.

A further object of the invention Vis to provide tor the convenient insertion and removal of the workpiece with respect to a work-holder, and also to provide for the con `venient manipulation of the work-holder to move the lat-ter towards and away from the cutting tool as well as to swing the `work with respect to the cutting tool so as to produce an arcuate opening in the workpiece.

With these and other objects in view, the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings and particularly pointed out in the appended claims, it of course being understood that changes in the form, proportion, size and minor details may be made, within the scope ot the claims, without departing from the spirit or sacri iicing any of the advantages ot' the invention.

In the drawings:

Figure 1 is a side elevation ci a machine el'nbodying the features oi5 the present in- `vention.

Figure 2 is a sectional elevation on the line 2--2 of Figure 1.

Figure 3 is an irregular vertical sectional view on the line 3.-3 of Figure 2. l

Figure fl is a detail sectional `view on the line 4 4 of Figure 2. j

Figure 5 is a view similar to F igure l showing another embodiment of the means for moving the work-holder towards and away 'from the cutting tool.

1921. Serial No. 466,006.

Figure 6 isa cross sectional view on the line of Figure 5.

The embodimentof the present invention, as shown in the accompanying drawing, includes a frame or support for the working parts of the machine, said frame or support including a bed land leg standards 2. As best shown in Figures 2 and 6 of the drawings it will be seen that the bed l is oi channel formation in cross section and has inwardly directed guide rails 3 at the topsl of the upstanding side flanges of the channel section bed. These guide rails 3 deiine a guideway in which works a work-holder consisting of a carriage l in the form of an upright plate having a substantially horizontal base 5 projecting at one side only thereof and shaped at its opposite longitudinal edges to engage and slide upon the guide rails 3, as clearly shown in Figure 2 of the drawings. Disposed centrally upon the bottom of the base 5 is a longitudinal rack 6 meshing with a pinion 7 mounted upon a rock shaft 8 extending across the bed l and journaled in the upright flanges thereof, whereby the carriage may be moved back and forth upon'the bed in amanneras will be hereinafter more fully described.

Mounted to oscillate upon a horizontal axis and disposed in front of the upright carriage portion t is a work-holder 9 in the form ot a'flat plate pivotally supported near its lower edge and midway between the opposite upright edges upon a suitable pivot l0, preferably in the form of a bolt as clearly indicated in Figure 3.

For the guidance of the work-holder 9 in its oscillatory movement about the pivot pin 10, said work-holder is provided with a pin or post. 12 having its head 13 countersunk in the front 'tace ot the member 9 so vas to lie Hush therewith. The shank of the pin or post 12 is received within an arcuate slot 11 formed in the part et of the carriage and struck from the pivot 10 as a center. A suitable nut Mis provided upon the rear end of the pin or post l2 sc asto hold the latter. against endwise. displacement and to enable convenient insertion and removal of the pin.I c i v .V

Disposed across the front of the workholder 9 just above the bottom edge thereof is across head 15 through whichk the bolt by fastenings 18 and 19, the fastenings 18y entering the cross head and the yfastenings 19 extending through blocks 2O which are in turn secured to the work-holder 9 by the fastenings 19. The spring clips or lingers 17 are spaced in front of the work-holder 9, as best indicated in Figure 3 of the drawings, and the upper end of each clip is flared or bent outwardly away from the work-holder.

The cross-head 15 projects a suitable distance beyond each upright edge of the workholder 9, and upon one projecting end there is an adjustable abutment 21 rising above the cross-head and provided with an eye portion 22 through which the cross-head is received. 'A suitable set screw 23 is carried by the bottom of the abutment and enters the eye for engagement with the cross-head to adjustably fix the abutment upon the cross-head. The' opposite end of the ycrosshead is provided wth a suitable handle 24, and at the inner side of the handle there is provided another abutment 25 having an eye portion 26 receiving the' cross-head and a set screw 27 to adjustably fix the abutment upon the cross-head.` A. cam 2S is pivotally.mounted, as at 23., upon the abut- -ment 25,. preferably in a slot therein so that the edge of the cam may work through the open side of the slot in the inner face of the abutment, the handle portion 29oft-he cam projecting. outwardly through the opposite open end of the slotand into position for convenient operation and adjacent the handle 24:.

TheUwork-piece, ywhich has been designated 36 is placed downwardly in the work receiving seat or socket defined by the workholder plate 9, the cross-head 15, the abutments 21 and 26 and the spring clips ortingers 17. The work-piece rests at its bottom edge upon the cross-head 15 and at its opposite upright edges against the abutments 21 and 26 which have been previously adjusted upon the cross-head to an approximate '[it for the work-piece, the cam 23 being afterwards manipulated to bear against the adjacent edge of thework-piece and snugly clamp the Ylatter betweenV the cam and the opposite abutment 21whereby the work-piece is snugly held upon the workholdeii. j I i In front f the work-holderis a suitable rotary cutting tool 31 mounted upon amrotatable, sha-ft or spindle jou-rnaled in spaced bearings 33 provided upon a substantial-ly lil-shaped bracket, 34 rising ,from the top ofthe bedl, there being a suitable driving piifl'l'ey 35.1nouiited upon thespindle or shaft 32 and located between the bearings 33.

One form of means for rocking the rock shaft 3 for moving the carriage towards and away from the cutting tool, has been shown in Figures 1 yand 2 and includes an upstanding lever 36 fixed between its ends upon one end of the rock shaft S at the outer side of the b'ed 1 and adjacent the handle 24. The upper end of the lever is provided with a weight 37, and its lower end is pivotally connected at 38 to a link or rod 39 which is mounted to slide endwise through an oscillating eye or guidel 40 pivotally mounted upon the-bed 1- upon a suitable pivot which has been designated 41 in Figure 2v of the drawing. Adjustable stops 42 and 43 are provided upon the link or rod 39 at opposite sides of the guide 40 for successive Contact with the latter to limit the swinging movements of the lever 36 and thereby limit the oscillatory movement of the pinion 7. As the pinion 7 is in mesh with the rac-l 6, the carriage 4 may be moved back and fort-lx upon the bed by the manipulation yof the leve-r 36.

In using the machine, as shown in Figures 1 to 4, the lever 36 is swung to its right hand limit so as to move the work-holder away from the cutting tool 31, whereupon the work-piece 30 is introduced into the work-holder and snugly clamped therein by manipulation of the clamping device formed by the cam 28. lVith the work-piece thus rigidly held upon the work-holder, the lever 36 is slowly swung to the left so as to move the carriage towards the rotary cutting tool 31 and to bring the'work-piece into engagement with the tool, the handle 24 of the work-holder being manipulated to swing the work-holder upon its pivotal axis 10 for the purpose of cutting an arcuate opening in the work-piece, such opening being shown at 44 in Figure 2 of the drawing. After the completion of the opening, the carriage and the work-piece are backed away from the tool by moving the lever 36 to the right, after which the clamp 23 may be released, the work-piece removed, another work-piece inserted and the operations repeated to produce an arcuate opening in the new work-piece, ltwill now be understood that thel parts 49, 42 and 43 constitute a stop toI limit the slidable movements of the carriage in opposite directions, thereby obviating loss of time in moving the Icarriage an unnecessary distance from the tool and also preventing the tool from engaging the work-holder 9 and injuring the lat-ter and the tool. A

In the form ofthe machine fhownindigures 1 and 2, hand manipulation ofthe lever 36 .is required to `move' the carriage todwards the cutter 31, Ybut this niloif'ement of the carriage may be accomplished by foot actuated means, such yfor instance as has been sho-wn in Figures 5 and 6 of the draw ings, wherein designates a link or rod `depending trom the gear or pinion 7 upon which it is pivotally hung as at 45. The lower end of the link is pivotally or loosely connected to a treadle 46 by means ot any suitable connection, as for instance a hook or eye 47 disposed about midway between the ends of the treadle. This treadle extends transversely beneath the bed of the machine, adjacent the floor and in convenient reach of a tootof the operator. The rear end of the treadle is tulcrumedjas at 48 upon. a rod or bar 49 hung from the bed l. Any suitable form of connection be tween the rod and the bed may be employed, such as by having the upper end of the rod or bar threaded and passed through an opening in the inwardly directed bottom flange 50 of the bed, there being nuts 5l provided upon the threaded end of the bar above and below the 'flange and set tightly there-against. The front portion of the treadle is guided upon an upright rod or bar 52 depending from the other inturned 'iange ot the bed and secured thereto in the manner described for rod 49. The rod 52 passes through a slot F3 extending longitudinally ott the treadle, and adjustable abutments 54 and 55 are provided upon the bar above and below the treadle. The adj ustable abutinents may be in the form of collars having set screws as clearly shown in the drawings and are intended to limit the up and down movements of the treadle and in turn limit the back and forth movements of the carriage in the manner of the parts 40, 42 and 43 shown in Figure l of the drawings.

Normally the treadle is at its upper limit iu engagement with the upper stop 54, and is yieldably held in this position by means ot a contractile spring 56 anchored or secured at one end to the bed oit' the machine as indicated. at 57, the other end of the spring being provided with a rod or-link 58 pivotally connected to the gear or pinion 7 at a point below the horizontal axis thereof.

lith the arrangements shown in Figures 5 and (i, the operator or attendant may actuate the treadle 45 with one 'loot so as to rotate the gear 'T and t'eed. the work towards the cutter 3l, thereby leaving both hands tree. for any other operations that may be necessary or desirable.

Each torni of carriage feeding means includes a tension device for yieldably main* taining the carriage at the limit of its travel away from the cut-ter thereby requiring a manual manipulation to feed the carriage towards the cutter, the tension device auto matically returning the carriage to its originaL position just as soon as the operator removes pressure trom the lever 36 in one iustance and the treadle 46 in the other in stance.

From the toregoing description, and as shown in the drawing, it will be readily understood that the machine ot' .the present invention embodies few parts, all of which are readily accessible for assemblage, replacement and repairs, and the parts are so arranged that the work-piece may be conveniently and quickly tted in place and removed, and the carriage together with the oscillatory work-holder are at all times under the convenient control of the attendant. The depth of the cut in the workpiece may be regulated by adjustment of the stop 43 so as to limit the forward travel ot the carriage towards the rotary cutter 31, so that after the stop has once been adjusted,

tlre attendant merely moves the lever 36 gradually towards the cutter until the movement is stopped by the stop 43 coming into contact with the guiding abutment 40.

In the construction shown in Figures 5 and 6, the depth of the cut in the wor piece may be regulated by adjustment of the stop so as to limit the downward movement of the treadle and the forward travel of the carriage towards the rotary cutter 31, so that after the stop has been adjusted the attendant merely presses his toot downwardly upon the treadle so as to gradually move the carriage towards the cutter until the movement of the treadle is stopped by the stop 55. Upon removing the itoot from the treadle the spring returnsthe treadle and consequently the carriage to its original position.

That is claimed is:

l. In a machine for cutting arcuate openingssuch as hand holes in stock, a rotary cutting tool mounted in relatively fixed position, a carriage movable toward and away .troni said tool axially thereof, a pivoted work holder on the carriage capable of oscillation in a plane at right angles to the axis of the tool, and means whereby the work holder may be moved tor moving the work with respect to the tool.

2. In a machine for cutting arcuate openings such as hand holes in wooden or other stock, astationary frame, a rotary cutting tool mounted in iixed relation with respect to the trame, a carriage slidably mounted upon the 'trame tor movement longitudinally thereof and ot the axis oi the tool, a worleholder pivoted on the carriage at a point eccentric with respect to the axis of the tool and capable of oscillation in a plane at right angles to the axis oi the tool, means ior moving the carriage, and means for swinging the work holder.

3. In a machine for cutting arcuate openings such hand holes in wooden or other stock, a fra-me, a horizontally disposed ro" lUO lary cutting too-1 mounted.. in relatively fixed position with respect to the fra-me and above the same, a carriage sldably mounted upon the'frame or'movement in a horizontalA dreoton towardk or from the tool, means for moving the carriage, a Workholder on the carriage pivoted thereon at a point eccentric with respect to the axis of the tool, the Work holder being capable of limited'` swinging movementn a Vertoalplane at right angles to the aXsof the tool.

In testimony whereof I affix my signature.

SILAS S. SEE. 

